Stoker and drive mechanism therefor



J. B. M KENZIE STOKER AND DRIVE MECHANISM THEREFOR July 2, 1940.

5 Shets-Sheet l Fil ed May 17, 1958 .6 1 E 4? km T A INVENTOR Joseph B. Mac/fen BY W y 2, 1940- J. B. M KENZIE STOKER AND DRIVE MECHANISM THEREFOR 5 Sheets-SheetZ Filed May 17, 1938 I INVENTOR I Joseph B. Macffenjze M #Wuj ATT RNEYS y 2, 1940- J. B. M KENZlE 2,206,745

STOKER AND DRIVE MECHANISM THEREFOR Filed May 17, 1938 5 Sheetls-Sheet s INVENTOR Joseph B. MacKergie BY, (7W

TTORNEYS July 2, 1940. J. B. M cKENZlE 2,296,745

STOKER AND DRIVE MECHANISM THEREFOR Filed May 17,1938 5 Sheets-Sheet 4 INVENTOR Joseph 5. Mac/fen] z'e BY 7 M r TTO RNEYS July 2, 1940.

Filed May 17, 1958 5 Sheets-Sheet 5 .w w R w 2 K W r v6 m mm A W 0% 4 m M 0 mm J mTLINm E E m ww mm 3 kw Q w Rh \m w w Wm @M w 5 m a 3 m Hm m knfwwfifl 1 Um wk Wk. @A. R z m Mm 5 mm .8 v E .3. N F...

Patented July 2, 1940 UNITED STATES PATENT OFFICE.

a... n. MaoKenlie, Eaglehurst, Erie, Pm, ualgnor to The Standard Stoker Company, In oorporated, a corporation of Delaware,

Application May 17, 1938, Serial No. mm Claims. (01. 74-131) This invention relates generally to mechanical stokers and more particularly to power transmitting means therefor.

An object of the invention is the provision in stokers having reciprocating power drive mechanism, of transmision mechanism for transforming the reciprocating. motion of the drive means -into continuous unidirectional rotary movement.

Another object of the'invention is the provision in transmission mechanism of the character described of means for readily reversing the direction of the resulting unidirectional rotary motion.

Another object of the invention is the provision of transmission mechanism of the character described that is simple in design, compact in construction, efllcient in operation and so arranged with the stoker and the tender of a locomotive as to be readily accessible for purposes of replacement or repair.

Another object of the invention is the provision in a locomotive tender of a stoker mechanism cheaply and readily installed and arranged 5 to occupy a small portion only of the space ordinarily provided for coal and water storage.

with above and other objects in view, the invention consists in the features of construction, the combination of elements and arrangement 30 of parts hereinafter more fully described and claimed, and illustrated in the accompanying drawings, in which Fig. 1 is a vertical central longitudinal section through adjacent portions of a locomotive and 35 tender with the stoker and drive mechanism applied thereon and shown partly in section and partly in elevation;

Fig. 2 is a fragmentary sectional plan view through the tender showing the stoker and driving means therefor, parts being broken away;

Fig.3 is a fragmentary sectional view taken on the line 3-4 of Fig. 1;

Fig. 4 is a fragmentary sectional view taken 5 on the line 4-4 of Fig. 1;

Fig. 5 is a sectionalview taken on the line 8-5 of Fig. 3; a i

Fig. 6 is a view of the driving mechanism, with the prime mover shown in section and the trans- -50 mission shown in elevation, with the transmission 1 casing cover removed;

Fig.7 isa sectional viewtaken on the irregular line 1-1 of Fig. 6;

Fig. Bis a sectional view taken on the irregular Fig. 9 is a sectional view taken on the irregular line 9-9 of Fig. 7; and

Fig. 10 is a sectional view taken-on the line lO-lfl of Fig. 6.

In the drawings; referring particularly to 5 Figures 1 to 5, an intercoupled locomotive and tender are designated generally by the letters L and T, respectively, with the novel stoker S applied thereto. The tender T comprises a frame l0 and a floor or deck ll spaced above the frame 10 Ill. The portion of the tender deck ll rearward of the coal gate l2 forms a floor for the fuel bin 3.

In the fuel bin l3 and secured in any suitable manner to the fuel bin floor are a pair of longi- 15 tudinally extending spaced upstanding plates i4 and I4. Mounted on the. bin floor between the plates l4, I4 is an open mouth trough l5 having an upstanding rear wall l5 and an open forward end. A filler plate l'l, extending forwardly from 20 the rear slope sheet [8 of the fuel bin I3 to the rear wall It of the trough I5, is preferably provided.

A cross wall l9 and the longitudinally extending walls 20, 20' form a compartment 2| disposed centrally at the forward end of the tender between the frame l0 and the deck I l and opening through the tender front wall 22. The tender deck II is provided at the forward end of the fuel bin l3 and between the bulkheads 23 with an opening 24 communicating with the compartment 2|.

The trough I5 is provided with a plate 25 extending transversely across the upper forward ends of the trough side walls, to which is secured a casing 26. The lower portion of the casing 26 extends through the opening 24 in the tender deck into the compartment 2| and is in the form of a chute 21.

A screw conveyor 28 is disposed in the trough IS, the rearward end thereof being journaled in a bearing 29 secured to the trough rear wall l8 beneath the filler plate I1. The forward end of the screw conveyor 28 extends into the casing 26 and'is journaled in a bearing 30 secured to the frontnwall 3| of the casing 26. Fuel is conveyed forwardly through the trough l5 and casing 25 'by the screw conveyor 28 and then drops by gravity through the chute 21 into the troughlike rearward portion 32 of the conduit 33. A 59 crusher member 34 arching over the screw conveyor 28 is secured to the rear side of the plate 25 and in conjunction with the screw conveyor 28 crushes the fuel to a suitable size for firing.

The forward portion of the conduit 33 is in the 5 form of a tubular member "extendingupwardly and forwardly from the tender to the locomotive.

Any suitable type of discharge conduit 88, uni-- versally connected. as at 31. to the forward end of the tubular member 38, may be employed for the delivery of the fuel to the locomotive iirebox (not shown). a v

. The rearward endof the conduit 88 is provided with rollers 88. 38' mounted in the guides 88. 81' extending longitudinally and secured to the frame Ill in the-compartment 2|. The rollers 38,18 provide for relative longitudinal movement between the conduit 88 and the tender conveyors 28 and 48 continuously in forward or reverse direction.

The engine 80 is mounted on the frame ID at the forward end of the tender and at one side of the conduit 88. The engine comprises a cylinder 8! housing a piston 52 which is reciprocable therein to operate a piston rod 88. Secured to the piston rod 53 is a rack gear 84 mounted to reciprocate in a housing 88 provided with a removable cover 56. Mounted-in roller bearings 81 in the housing 55 and cover 58 are a pair of horizontally alined spaced parallel shafts l8 and 58 extending transversely ofand above the rack gear 54. A gear 60 is loosely mounted on the shaft 58 and is in constant mesh with the rack gear 84. A second gear BI is loosely mounted on the shaft 58 and is also in constant mesh with the rack gear 84.

On the forward stroke of the rack gear 84, the gear 80 is rotated in a clockwise direction and turns the gear 62, which is loosely mounted on the shaft 58, in the same direction by means of the engaging clutch teeth 88 and 54 provided on the adjacent faces of the gears 60 and 82, respectively. The clutch teeth 88 are formed on a clutch member which is arranged for movement longitudinally of the axis of the gear 82, by means of the pins 88 threaded at one end in the clutch member 85 and fitting loosely at their other ends in the openings 61 extending through the gear 82. A coil spring 68 urges the clutch member 85 away from the gear 82 and maintains the clutch teeth 83 and 64 in engagement.

The gear BI is also rotated in a clockwise direction by the rack gear 54 on its forward stroke. The gear 62 is in constant mesh with a gear 88 loosely mounted on the shaft 89, thus turning the gear 89 in a counterclockwise direction. The gears 81 and 69 are provided with clutch teeth 10 and II, respectively, formed to act opposite to the clutch teeth 63 and 84, respectively, so that on the forward stroke of the rack gear 84, the clutch teeth 10 and II will rideover each other against the pressure of the spring [2, disengaging the gears II and 89.

On the back stroke of the rack gear 54, the

gear BI is rotated in a counterclockwise direction and turns the gear 69 in a similar direction through engagement of the clutch teeth In, H. The gear 82 is in constant mesh with the gear 88 and is turned in a clockwise direction. Clockwise rotation of the gear 62 causes the clutch teeth 84 to ride overthe clutch teeth 83 of the gear 88, which. on the backstroke of the rackgear-ll, is rotated in a counterclockwise direction. I

Thus on both the forward and backlstrokeo'f the rack gear 88, the gear 82 is caused to rotate in a clockwise direction. The gear 82 is' arranged to engage a gear." mounted ona shaftll iournaled in roller bearings 18 in'the casin Y88 and cover 81. The gear 18 is arranged for slidable movement axially along the shaft ll by means of keys and keyways l8 and I1, respectively, and causes rotation of the-shaft ll in a counterclockwise direction.

The shaft ll extends rearwardlrthrough the housing 88 and has a sprocket wheel 18 mounted thereon exterior of the housing 88. The screw conveyor 28 is provided with a projecting shaft portion 19 extending forward of the bearing 80 and has mounted thereon a sprocket wheel 80. A sprocket chain 8! passes over the sprockets I8 and 80 for operating the screw conveyor 28 from the engine 50. A casing 88 houses the sprocket 80 and that portion of the sprocket chain 8| that travels above the level of the tender deck I l. A gear 82 keyed on the forward end of the shaft ll within the casing 88 meshes with a gear 83 keyed on a shaft 84 Journaled in roller bearings 88. An extensible shaft 88 is universally connected at one end. with the shaft 84 and at its other end with the gearing 81 at the rearward end of the conduit 88 for driving the screw conveyor 48. From the foregoing description it will be seen that the screw conveyors 28 and I! are arranged to be driven continuously in one direction by separate shafts operatively connected through the described transmission and rack gear H with the reciprocating engine 88.

At times, as when a clog occurs in the conveying mechanism, it is necessary to reverse the direction of rotation of the screw conveyors. For this purpose a shifter yoke 88 is pivotally mounted in the casing 55. The yoke 89 is provided with inwardly extending lugs 80 engaging a groove 8| extending circumferentially of the sleeve portion 82 of the gear I8. Referring particularly to Fig. 7, it will be seen that movement of the yoke 88 in a counterclockwise direction about its pivot will shift the gear 18 to the right out of engagement with the clockwise rotating gear 82 and effects engagement of gear 83 with the counterclockwise rotating gear 69, thus reversing. the direction of rotation of shaft ll, to which the gear 88 is' splined. Changing the direction of rotation of shaft 14 effects reversal of rotation of screw conveyor 28 and also effects reversal of rotation of screw conveyor 40 through meshed gears 82 and 88 and shaft 84.

From the above description it will be apparent that the stoker conveyor screws can be operated continuously in either forward or reverse direction from the reciprocating engine 80.

I claim:

1. Means to transform a reciprocating driving motion into a continuous unidirectional motion comprising an ultimate driving shaft, a gear mounted on said shaft, a reciprocating rack gear, a pair of spaced shafts. a driving gear loosely mounted on each of said spaced shafts, said drivdriving and driven gear on the other of said spaced shafts being provided with separate op- 2,200,745 positely acting overrunning clutch means, one,

comprising an ultimate driving shaft, a gear mounted on said shaft, a reciprocating rack gear, a pair of spaced shafts, a driving gear loosely mounted on each of said spaced shafts, said driving gears being in constant mesh with said rack gear, a driven gear looselymounted on each of said spaced shafts, said driven gears being in constant mesh, the driving and driven gear on one of said spaced-shafts and the driving and driven gear on the other of said spaced shafts being provided with separate oppositely acting overrunning clutch means, one of said driven gears meshing-with the gear on said ultimate driving shaft.

3. Means to transforma reciprocating driving motion into a continuous unidirectional motion comprising a pair of ultimate driving shafts, a gear mounted on one of said ultimate driving shafts, a reciprocating rack gear, a pair of spaced shafts, a driving gear loosely mounted on each of said spaced shafts, said driving gears being in constant driving relation with said rack gear, a driven gear loosely mounted on each of said spaced shafts, said driven gears being in constant driving relation, the driving and driven gear on one of said spaced shafts and the driving and driven gear on the other of said spaced shafts being provided with separate oppositely acting overrunning clutch means, oneof said driven gears being in driving relation with the gear on the said one of said ultimate driving shafts, and gearing operatively connecting said last named ultimate driving shaft with the other of said ultimate driving shafts.

4. Means to transform a reciprocating driving motion into a continuous unidirectional motion.

comprising an ultimate driving shaft, a reciprocating rack gear, a pair of spaced shafts, a driving gear loosely mounted on each of said spaced shafts, said driving gears being in constant mesh with said rack gear,'a driven gearloosely mounted on each of said spaced shafts, said driven gears being, in constant driving relation, the driving and driven gear on one of'said'spaced shafts and the driving and driven gear on the other of said spaced shafts being provided with separate oppositely acting overrunning clutch means, a pair of gears slidably keyed on said ultimate driving shaft for movement axially therealong, and means for moving one of said last named gears into driving relation with one of said driven gears for turning said ultimate driving shaft in one direction and for moving the other of said last named gears into driving relation with the other of said driven gears for turning said ultimate driving shaft in the opposite direction.

5. Means to transform a reciprocating driving motion into a continuous unidirectional motion comprising an ultimate driving shaft, a reciprocating rack gear, a pair of spaced shafts. a driving gear loosely mounted on each of said spaced shafts, said driving gears being in constant driving relation with said rack gear, a driven gear loosely mounted on each of said shafts, said driven gears being in constant driving relation, the driving and driven gear on one of said spaced shafts and the driving and driven gear on the other of said spaced shafts being provided with separate oppositely acting overrunning clutch means, and means on said ultimate driving shaft arranged for selective engagement with one or the other of said driven gears for continuously operating said ultimate driving shaft in a clockwise or counterclockwise direction.

6. Means to transform a reciprocating driving motion into a continuous unidirectional motion comprising an ultimate driving shaft, a reciprocating gear, a pair of spaced shafts, a driving gear loosely mounted on each of said spaced shafts, said driving gears being in constant driving relation with said rack gear, a driven gear loosely mounted on each of said spaced shafts, said driven gears being in constant driving relation, the driving and driven gear on one of said spaced shafts and the driving and driven gear on the other of said spaced shafts being pro-' 

